Definition of unified field theory in English:

noun

For the remainder of his life he sought without success a unified field theory embracing electromagnetism, gravitation, and quantum mechanics.

His aim was to unite relativity with the theory of electromagnetism and produce a unified field theory - the forerunner of today's theories of everything.

On the contrary, he wanted nothing more than to find a unified field theory which not only would join together gravitational and electromagnetic forces but also would provide the basis for a new interpretation of quantum phenomena.